Rijndael offers multiple key sizes, however it cannot be arbitrary. Which of the following key sizes is not offered with Rijndael?

A.
256

B.
128

C.
192

D.
164

Explanation:
Rijndael, which is the algorithm that was chosen for the AES standard,
offers only three distinct key sizes: 128, 192, and 256. Block sizes are the same
sizes. Substitution rounds vary from 10 to 14 depending upon the key size and block
size.